symlinks: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/symlinks - from package: symlinks

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/symlinks - from package: symlinks

You may install the required package with command apt-get install {package}

Error in other languages:
symlinks: bevel nie gevind nie
symlinks: comandă negăsită
symlinks: comando não encontrado
symlinks: commande introuvable
symlinks: command not found
symlinks: käsku ei ole
symlinks: không tìm thấy lệnh
symlinks: komanda nerasta
symlinks: Kommando nicht gefunden.
symlinks: kommandot finns inte
symlinks: komut yok
symlinks: nie znaleziono polecenia
symlinks: níor aimsíodh an t-ordú
symlinks: no se encontró la orden
symlinks: no s'ha trobat l'ordre
symlinks: opdracht niet gevonden
symlinks: parancs nem található
symlinks: perintah tidak ditemukan
symlinks: príkaz nenájdený
symlinks: příkaz nenalezen
symlinks: команда не найдена
symlinks: командата не е открита
symlinks: 命令找不到
symlinks: コマンドが見つかりません